Lock mechanism



March 4, 1958 o'BRlEN 2,225,218

LOCK MECHANISM v Filed Aug.- 27, 195e 2 sheets-sheet 1 March 4, 1958 E. OBRIEN 2,825,218

LOCK MECHANISNI Filed Aug. 27, 1956 2 Sheets-Sheet2 Lock MECHANISM Eugene OBrien, Philadelphia, Pa. Application August 27, 1956, seal No. 606,252

claims. (cl. 10.-7)

This application relates'to my copending application Serial No. 533,658 now Patent No. 2,766,605 granted October 16, 1956 and relates to a lock mechanism which is an improvement over the mechanism therein described.

In my said patent is shown and described a lock mechanism which employs a conventional padlock whose body instead of its shackle engages the staple thereby increas- States Patent() ing the security of the lock mechanism to a considerable i extent. Said lock mechanism also includes a removable protective housing which is selectively released and locked simultaneously with the opening and closing of the padlock as well as other structural features.

The primary object of the present invention` is to provide a lock mechanism which still employs the padlock body instead of its shackle as the major securing member but which is simpler in lconstruction and function than that described in said patent.

Another object of the invention is to provide a lock Imechanism which employs a lug with a substantially rectangular recess for receiving a portion of the body of a padlock whose shackle encirclcs the lug and is xedly retained in position to allow movement of the padlock body into and out of said recess. The padlock and shackle retaining means can be mounted upon a plate having a slot to receive the lug, the plate serving as a member to bridge the juncture between such elements as` a door and door jamb, a furniture drawer and drawer frame, etc. Y

Another object of the invention is to provide a lock mechanism of the character described in which the padlock and shackle retaining means are mounted on the hinge plate of a hasp member, the hinge plate having a slot for receiving the lug.

ICC

Fig. 4 is a view similar lto Fig. 2 illustrating the lock mechanism in its closed position; f

Fig. 5 is a perspective view of the hinge-plate of the hasp member; j

Fig. 6 is a perspective view of the other or securing plate of the hasp member;

Fig. 7 is a perspective view of the padlock mounting plate; andk Fig. 8 is a perspective view of a modified form of the invention.

Specific reference is now made to the drawings wherein similar reference characters are used for corresponding elements throughout.

Referring lirst to Fig. 8 which illustrates the invention in its broadest aspect, the lock mechanism comprises a keeper in the form of a lug 10 having a substantially rectangular recess 12 opening through one edge thereof.

In actual practice the entire lug may be L-shaped -as shown. The lug is welded to or integral with a plate 14 which may be secured by any suitable means to a door jamb, furniture drawer frame or any suitable support 16 adjacent the juncture 18 between the member 16 and an adjacent member 20 such as a door, furniture drawer, etc.

A plate 22 serving as a bridging member is provided which has a slot 24 of length slightly exceeding the length Another object of the invention is to provide a lock mechanism of the character described immediately hereabove in which a means is provided for locking together and unlocking the hasp plates themselves simultaneously with the closing and opening of the padlock. A housing can be provided which is carried by the hinge hasp plate for protectively embracing the lug, the shackle, the shackle retaining means and the padlock body. Y

And yet another object of the invention is to provide a lock mechanism which is relatively simple in construction and operation, relatively inexpensive, resistant to picking or dislodgment by force and considerably more secure than conventional padlocks of greater size 'and better quality than the padlock employed in the present lock mechanism. l

These and other objects will become more apparent as the following description proceeds in conjunction with the following drawings, wherein:

Fig. l is a top plan view of the lock mechanism;

Fig. 2 is a sectional view taken on the line 2-2 of y' YFig. 2;l

of the arm 26 of the keeper lug.y Secured by any suitable means on the plate 22 adjacent one end thereof and beyond the slot is a block 28 having a transverse bore therethrough which receives the bight or central portion of a kconventional U-shaped shackle 30 which is operative connected to a padlock body 32. The padlock body, rests slidably on the plate and is of a thickness approximating the depth of the recess 12.

In operation, when the padlock is open, the plate 22 is slipped over the lug 10 so that the latter extends through the slot 24 with the shackle embracing the lug, the rounded-corner of thelug serving to smooth this operation. Since the shackle of the padlock is lixedly anchored to the plate 22 by the block 28, closing and opening of the padlock is effected by sliding the padlock body 32 on the plate 22 towards and away from the keeper lug 10. When the padlock is closed it assumes the position shown in solid lines wherein the padlock body 32 enters the recessV 12 of the keeper lug 10. Because the length of the slot 24 receiving the lug only slightly exceeds the length ofthe lug armY 26, movement of the plate 22 to the right of Fig. 8 until the lug 10 strikes the end of the slot 24 will not allow the padlock body 32 to clear thefedge 34 of the lug arm 26, when the padlock is closed. When the padlock is opened by means of a key (notshown) operating through the end 36 of the padlock body,` the shackle will spring open and the padlock body will move on the plate 22 to the position shown in phantom in Fig. 8, in which position, the inner edge 38 of the padlock body will clear the edge 34 of the keeper lug sufficiently to permit removal of the plate 22 together with theV padlock as a unit. This is the unlocked position of the mechanism. Y l

Figs. l-7 show the application ofthe above described mechanism to a hasp member. The hasp member comof predetermined length vand suiicient to bridge the junc-y ture 58between the door 48 and door jamb 60 or similar structural element. 'Towards its hinged end, the second plntei is providedr with an aperture 62 of sufficient diamo-tento clear.the. head. of. the pin 50. and a pair. of longitudinal guide ribs 64.1 Towards its other end, the second plate 54 is providedwithan elongated slot 6,6 of predetermined length and several tappedholes 6,8 for a purpose soon to appear. Y

Slidably mounted on the second plate 54 between the guide ribs 64 is a third plate 70. One edge ofthe third plate 70 has an upstanding ange 72` and spaced therefromis an angle piece 74, the members 72 and 74 cooperating to form stops between which is mounted the body 76 of a conventional padlock. Beyond the stop 74, the plate 70is provided with a bayonet slot 78 which comprises an enlarged portion 80 of diameter `slightly largerthan the head of the pin 50 and a reduced portion 82 otV width less than the diameter of the head of the pin 50 for a purpose soon to appear.

Secured to a door jamb or similar structural element by appropriatemeans such as boltsV and` nuts 84 is a plate 86 to which is welded `or otherwise secured a keeper in the form of a generally L-shaped lug 88 having a steppedv recess 90 opening towardthe door member, the edge 92 ot'l the lug terminating proximate the juncture S8 between the doorand door jamb.

The padlock `body is operatively connected to a conventional generally U-shaped shackle 94 which is adapted to `encircle the keeper lug 88. The shackle is removably retained in a fixed position by a means comprising a block i 96 which is mounted on the second hinge plate beyond the slot 66and there secured by means of screws 98 extending. through the outer holes 68- and into the block. The block has a transverse bore 100 which receives the bight or` central portion of the padlock shackle that is adjustably centered in the bore by means of-a set screw 102. The set screw extends through themiddle hole 68 of' the second hasp plate 54 through the block 96/ randy into the bore 100 thereof.

Welded to or integral with the second hasp plate 54 isa protective housing 104 which embraces the shackle retaining block 98, the shackle 94, the keeper lug 88 and the padlock body 76,V the housing being open at one ofits ends, as at 106 to permit movement of-the padlock iiody therethrough towards and away from the keeper In operation, whenthe key 108 is operated to open thepadlock., the padlock body 76l andv its mounting plate 70 are moved to the right of the figures by the action of the padlock spring since the shackle94 is fxedly held by the block 96. The open position of` the mechanism 1s` shown, in Fig. 3 and in this position the aperture 62 of the second hasp plate 54 is in alignment with the enlarged portion 80 of the bayonet slot 78 of the padlock mounting plate 70.

When the second hasp plateA 54 and partsrthereon are movedtowards the keeper lug 88, the latter enters the slot 66 and the housing 104 with the shackle'94 em` bracing the lug, `the length of the slot 66 being only slightly in excess of the' length of the arm 110 of the keeper lug. The headed pin 50 also enters the aligned holes 62 and 80. The padlock is closed by moving the body 76 towards the lug 88 and when it is` snapped shut, the forward portion of the padlock body` enters one portion of the step recess 90 and the flange or stop 72 of the plate 70enters the other `portion ofj the steprecess 90 of the keeper lug 88 as shown'in Fig. 2. Since the padlock mounting plate 70 moves with the padlock, in the closed position the narrower portion 82 of the bayonet slot 78 lthereof engages beneath the head of the `pin 50 i thereby locking the yhasp plates 40 and54 together. Thus the hasp plates are locked and released simultaneously with the" `opening and closing loli the padlock.`

Since the lengthY of the slot 66 approximates that of the` arm 110 of the keeper lugY 8,8, evenr if one should succeed in removing the, hinge pin in the hasp member,

movement of the second hasp` plate 54 will still not eiect,

Aan opening of the lock mechanism. Further security i against picking `and, tampering is obtained because the `Since the heads of the, attachingscrews 98 and the slot of the set screw 102 are at the undersurface of the second hasp plate 54, the block attaching screws 98 and set screw 102 cannot be removed when the lock isclosed but only when it is open.

While preferred embodiments of the invention have been shown and described herein, minor variations may be made by skilled artisans without departig from the spirit of the invention and the scope of the appended claims, Thus the housing 104 may be secured to the plate 2 2 of the form of the invention shown in Fig. 8 and may be excluded from the form of the invention shown in Figs. `1-7.`

I claim:

l. A lock` mechanism comprising a keeper in the form of a` lug with aV substantially rectangular recess, a bridging member in the form of a plate having a slot through which the lug extends and a latch mechanism including a key-operated padlock having a body slidable on the plate, a shackle embracing the lug, one leg of which is permanently engaged in the body while the other leg is movable from an open positionl free of the body to a closed position in engagement with the body and a means secured to theplate and tixedly retainingthe shackle whereby upon sliding the bodyV towards the lug from the open to the closed position, the shackle closes and the body is lock. ingly in position in the recess and when the padlock is opened,V the padlock body clears they recess of the lug to permit removal of the latch mechanism and plate.

2. The device of claim 1 wherein the shackle retaining means is a block secured to the plate adjacent one end thereof and beyond the slot and a bore through the block receiving a portion of the shackle.

3. A lock mechanism comprising a keeper adapted to be secured "to `a door jamb, said keeper including a lug having a substantially rectangular recess, a hasp member including a tirst plate adapted to be secured to a door and a secondfplatehinged thereto, said` second plate including a slot through which said lug extends, a key-operated padlock including a body and shackle, one leg of which is permanently engaged `in the body while the other leg is movable from an open position free of the body to a closed position in engagement with the body, means slidably mounting said body on said second plate with said shackle embracing said lug, and means secured to the second plate and tixedly retaining said shackle whereby said body may be, moved into and out of said lug recess` to selectively closeand open the lock mechanism.

4, The device of claim 3 and a housing carried by said second plate andembracing said lug, said shackle, said shackle. retaining means and said padlock body, said housing beingI open at one end to permit sliding movement of saidpadlock body towards and away from said lug.

5. A lock mechanism comprising a keeper adapted to be secured toa door jamb, said keeper including a lug having a substantially rectangular recess, a hasp member including a rstplate adapted to be secured to a door and a second plate hinged thereto, said second plate includ ing a slot through which said lug extends, a key-operated .padlock including a body andy shackle, means slidably mounting said body on said second plate with said shackle embracing said lug, means tixedly retaining said shackle whereby said body may be moved into and out of said lug recess to selectively close and open the lock mechanism and further means to lock said second and tirst plates to- 5 gether and to unlock them simultaneously with the opening and closing of the lock mechanism.

6. The combination of claim 5 wherein said shackle retaining means includes a block removably secured to said f first plate adjacent one end thereof and beyond the slot, and a bore through said block receiving a portion of said shackle. i

7. The combination of claim 6 and a set screw in said block entering said bore and adapted to bear on said shackle to center the same.

8. The combination of claim 5 wherein said means slidably mounting said body on said second plate includes guide ribs on said second plate, a third plate positioned on said second plate between said guide ribs, and stop members on said third plate between which said padlock body in retained.

9. The combination of claim 5 wherein said means slidably mounting said body on said second plate is a third plate retaining said padlock body and guidingly positioned on said second plate, said means to lock together and un- 20 lock said first and second hasp plates simultaneously with the opening and closing of the lock mechanism comprising a headed pin carried by said first hasp plate and extending through an aperture provided in said second plate of sufficient diameter to clear the head of said pin and a bayonet slot in said third plate, said bayonet slot including a first portion large enough to receive the head of said pin and a second portion of width less than the diameter of the head of said pin whereby upon sliding the padlock body and third plate towards the lug to close the lock, the pin entersr the second or narrower portion of said bayonet slot to lock said first and second hasp plates together.

10. The combination of claim 5 and a housing carried by said second plate and embracing said lug, said shackle, said shackle retaining means and said padlock body, said housing being open at one end to permit sliding movement of said padlock body towards and awayV from said lug.`

References Cited in the file of this patent UNITED STATES PATENTSA 550,066 Campbell Nov. 19, 1895 1,976,274 Yanusko Oct. 9, 1934 FOREIGN PATENTS 16,755 Great Britain Aug. 20, 1901 

